Electricity: motive power systems – Positional servo systems – 'reset' systems
Reexamination Certificate
2005-02-22
2005-02-22
Ro, Bentsu (Department: 2837)
Electricity: motive power systems
Positional servo systems
'reset' systems
C318S621000, C318S632000
Reexamination Certificate
active
06859006
ABSTRACT:
A position control method for accurate position control of a driving source is disclosed. The method of the present invention comprises the steps of comparing a remaining driving amount of the driving source to a target position with a mechanical dead zone of a power transmission mechanism, controlling the position of the driving source by a proportional and derivative operation on a deviation of the position detected by the position detection circuit from a command position obtained from a speed command value while the remaining driving amount is larger than the mechanical dead zone, and controlling the position of the driving source by a proportional, integral, and derivative operation on the deviation of the position detected by the position detection circuit from the command position obtained from the speed command value when the remaining driving amount becomes smaller than the mechanical dead zone.
REFERENCES:
patent: 4563735 (1986-01-01), Hiroi et al.
patent: 5801939 (1998-09-01), Okazaki
patent: 5915401 (1999-06-01), Menard et al.
patent: 6272401 (2001-08-01), Boger et al.
Canon Kabushiki Kaisha
Cowan Liebowitz & Latman P.C.
Ro Bentsu
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